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02-09-2015, 05:18 PM | #21 |
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Re: silicone brake fluid proof brake light switch
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02-09-2015, 05:34 PM | #22 |
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Re: silicone brake fluid proof brake light switch
Depends on the master cylinder, some have them and some do not. Not having them can be a source of wheel cylinder leakage.
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02-09-2015, 09:03 PM | #23 |
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Re: silicone brake fluid proof brake light switch
Thanks for the tip ,The duel M cylinder is a modern one so I would think maybe there is a valve in the out let only , ? disk and drum M/C
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02-09-2015, 09:46 PM | #24 |
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Re: silicone brake fluid proof brake light switch
Maybe, maybe not, depends on how the system was set up. As an example might have had a combination valve that served that function.
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04-24-2019, 08:32 AM | #25 | |
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Re: silicone brake fluid proof brake light switch
Quote:
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04-24-2019, 08:39 AM | #26 |
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Re: silicone brake fluid proof brake light switch
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Update: Genuine Harley Davidson, part # 72023-51D OK, second update! This was already covered in detail earlier in the thread!!!! Last edited by JSeery; 04-24-2019 at 08:57 AM. |
04-24-2019, 09:06 AM | #27 |
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Re: silicone brake fluid proof brake light switch
I was running the Harley switch and it failed too. I ended up switching back to DOT3 when I did a total rebuild of the brake system.
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06-12-2019, 09:14 PM | #28 |
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Re: silicone brake fluid proof brake light switch
So, does anyone have an answer? I was over reading the Harley boys forum and they are not buying HD switches because they are not made by HD and fail. They suggested Accel 181101.
Anyone using that one? I am gettting tired of the 9 month and replace $9.99 ones that I now buy 10 at a time. |
06-13-2019, 02:24 AM | #29 |
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Re: silicone brake fluid proof brake light switch
I agree with BINX. Don't use silicone fluid. Stay with DOT 3 and perhaps every two years or so bleed the system and renew the fluid. £5 will buy you a brake fluid tester which will determine if there's any water in the system and it's water that's the killer.
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06-13-2019, 04:48 AM | #30 |
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Re: silicone brake fluid proof brake light switch
i use the chevy lever switch the reason is they can be adjusted to be more senative the hydl switch requires pressure. the lever switch puts the lights on sooner giving the car behined you more time to know your stopping .plus i use dot five if your car sits it,s the best way to go
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06-13-2019, 09:19 AM | #31 |
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Re: silicone brake fluid proof brake light switch
I'm with Richard.To me the hydraulic ones are a waste of time.The lever switch is the only way to go.Its foolproof. Just touch the pedal slightly and the brake lights come on.Used it on last 5 cars I built.Speedway has them pretty cheap.
Here it is $6.99 at Speedway https://www.speedwaymotors.com/Speed...itch,1972.html Last edited by deuce lover; 06-13-2019 at 10:34 AM. |
06-13-2019, 09:48 AM | #32 |
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Re: silicone brake fluid proof brake light switch
I've used the lever switches for years. Never had one fail so far. It's a simple solution when using dot 5 fluid. Depending on where you buy the switch they cost between $10-15 and it's a one time purchase.
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06-13-2019, 10:03 AM | #33 |
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Re: silicone brake fluid proof brake light switch
Yeah. Give up on the hydraulic switch and go to one off of the pedal, as said.
https://www.amazon.com/Allstar-Perfo.../dp/B003C01FFY |
06-14-2019, 04:05 PM | #34 |
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Re: silicone brake fluid proof brake light switch
Years ago when i had the same failure with silicone fluid and the original style brake light switch i spent time trying to figure out why they fail. I found the seal in the brake light switch was the problem its not compatible with silicone. Once the seal fails the two contacts inside the switch are now flooded with the silicone fluid. The fluid now is causing a high resistance to make the contacts work correctly if i pressed really hard on the pedal the brake lights would work. Any heavy duty brake light switch would still have the same problem there called heavy duty to handle more load not a change in brake fluid type. My solution is exactly as others have written a mechanical brake light switch problem solved.
Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
06-14-2019, 04:42 PM | #35 |
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Re: silicone brake fluid proof brake light switch
HD switch is smaller and cheaper than Ron's ( about half the price).. Works great and I'm told HD uses silicone brake fluid.
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06-15-2019, 07:44 PM | #36 |
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Re: silicone brake fluid proof brake light switch
I have a HD switch on my wagon for almost 30 years! bought a ron francis switch for my 41 truck and it lasted about 10 years. silicon molecules are so small they sneak past the disc in the switch effectively neutralizing the switch
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06-16-2019, 09:18 PM | #37 |
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Re: silicone brake fluid proof brake light switch
I don't think it's the silicone fluid making them fail. I started having those switches fail 40+ years ago before there was silicone fluid. old ones lasted for years, newer ones failed in a year or so with DOT3. American made, etc.
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07-11-2022, 10:53 AM | #38 | |
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Re: silicone brake fluid proof brake light switch
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07-11-2022, 11:12 AM | #39 |
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Re: silicone brake fluid proof brake light switch
Yeah I've switched to the lever switches on all of my cars after having two Ron Francis switches fail. Never tried the Harley but I was tired of messing with it. I only had one lever style switch eventually wear out and it was 20 years old.
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